METHOD OF FORMING FLUID FLOW FIELD PLATES FOR ELECTROCHEMICAL DEVICES
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United States of America Patent
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Issued Date -
Sep 11, 2008
app pub date -
Mar 6, 2008
filing date -
Mar 6, 2007
priority date (Note) -
Abandoned
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Abstract
A method of making graphite articles for electrochemical fuel cells, such as fluid flow field plates, by partially impregnating a porous, self-supporting expanded graphite sheet with a first binder comprising a first liquid resin to form a partially impregnated graphite sheet; mechanically deforming at least one surface of the impregnated graphite sheet to form an intermediate fluid flow field plate; impregnating the mechanically deformed intermediate fluid flow field plate with a second binder comprising a second liquid resin to form an impregnated fluid flow field plate; and curing at least the second resin to form a substantially fluid impermeable fluid flow field plate.
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